The Actinophryna are propagated like the lowest vegetables by gemmation and conjugation, shown in B fig. 87; moreover Mr. Carter saw the production of germ-cells and motile particles in the Actinophrys exactly after the mode already described in the Amœba. Mr. Carter mentions an instance in which the Actinophrys sol showed what may possibly be a certain degree of instinct. An individual was in the same vessel with vegetable cells charged with particles of starch; one of the cells had been ruptured and a little of the internal matter was protruded through the crevice. The Actinophrys came, extracted one of the starch-grains, and crept to a distance; it returned, and although there were no more starch-grains in sight, the creature managed to take them out from the interior of the cell one by one, always retiring to a distance and returning again, showing that it knew its way back, and where the starch-grains were to be found. On another occasion Mr. Carter saw an Actinophrys station itself close to the ripe spore cell of a plant, and as the young zoospores came out one after another, the Actinophrys caught every one of them even to the last and then retired to a distance as if instinctively conscious that no more remained. Like Amœbæ these animals select their food, but notwithstanding the superior facility and unfailing energy with which they capture prey larger and more active than themselves, they are invariably overcome even by a very small Amœba which they avoid if possible. When they come into contact the Amœba shows unwonted activity, tries to envelope the Actinophrys with its pseudopodia, but failing to capture the whole animal it tears out portions and conveys them to improvised vacuoles to be digested. Dr. Wallich mentions that he had seen nearly the half of a large Actinophrys transferred piecemeal to the interior of its enemy, where it was quickly digested. _Fig. 88, p. 19._ [Illustration: ACANTHOMETRA BULBOSA.] As every part of the body of the Actinophrys is equally capable of performing the part of nutrition, respiration, and circulation; and as in the absence of muscles and nerves they may be presumed to have no consciousness, the marks of apparent intelligence can only be attributed to a kind of instinct, and their motions to the vast inherent contractility of the sarcode and its enclosing film, which is also the case with the Amœbæ.